Sudden increase in weight and bulging stomach, mainly consider improper diet, fluid in the abdominal cavity and other reasons, it is recommended to choose a regular hospital for examination. Common causes 1, bad eating habits: poor eating habits in the short term, such as overeating, overeating high-calorie, high-protein and indigestible food, such as doughnuts, meat, sweets, etc., too little daily activity, resulting in rapid accumulation of fat, abdominal bulging, sudden weight gain; 2, excessive mental stress: can be due to life, work pressure and other reasons caused by increased eating, indigestion and other conditions, thus intake too much food leading to such symptoms; 3, abdominal fluid: such as liver cirrhosis, kidney disease, peritonitis, cardiovascular disease, resulting in increased abdominal fluid, fluid is difficult to drain, will lead to abdominal bulging, weight gain; 4, abdominal occupying diseases: some abdominal occupying diseases may lead to such symptoms, such as abdominal cysts or abdominal wall tumors, peritoneal tumors, etc., often accompanied by pain, fever and other signs. Treatment 1, improve diet: to light, easy to digest diet, such as vegetables, fruits, avoid high-calorie food, such as chocolate, cake, regular and quantitative meals, avoid overeating; 2, appropriate exercise: such as running, yoga, swimming, promote digestion, long-term adherence, can play a fat loss effect, and exercise can increase the body secretion dopamine, can relieve stress, regulate emotions; 3, the disease treatment: suspected by disease, it is recommended to promptly select the regular hospital consultation, identify the cause, according to the doctor’s recommendations to choose the appropriate treatment. Precautions recommend patients to improve the examination, such as abdominal ultrasound, X-ray examination. Usually pay attention to regular diet, slow down the speed of eating, control the amount of food, drink more hot water, appropriate exercise, such as running, to keep the bowel movements smooth.